Flywire will always offer you the best exchange rate available at that time of your payment submission. When you submit a payment request through us, we will ‘lock in’ a position and provide you with the exact amount of your currency you should send us. When a specific exchange rate is locked for you, it will remain unaltered in spite of any fluctuations in the currency exchange rate throughout the payment process. You are always guaranteed the best available rate at the exact moment of the payment submission. Learn more about Flywire's Best Rate Guarantee. Since currency exchange rates are always changing, we will not be able to change the rate once it is locked in for you, or accept a new payment request made for the same amount.